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Oneida Main Dam
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Oneida Main Dam Share
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Overview Share
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Preston, Idaho
Privately owned
Built in 1920

Oneida Main Dam is built on the Bear River and is located in Preston, Idaho. It was built in 1920 .

The dam is privately owned by Pacificorp.

Location
Oneida Main Dam
Preston, Idaho, U.S.
Dam type
Other
Dam type
Other
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Pacificorp
Owner
Private

Oneida Main Dam is privately owned by Pacificorp.

Construction Share
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1920
Completed
Bear River
River built on
Oneida Main Dam was built in 1920.
Metrics Share
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Summary
Dam length 420 feet
Dam height 114 feet
Structural height 111 feet
Hydraulic height 95 feet
Max discharge 74,270 cubic feet per second
Max storage 19,000 acre feet
Normal storage 10,880 acre feet
Surface area 357 acres
Drainage area 4,456 square miles
420 feet
Dam length

Length of the dam is defined as the length along the top of the dam. This also includes the spillway, powerplant, navigation lock, fish pass, etc., where these form part of the length of the dam. If detached from the dam, these structures should not be included.

114 feet
Dam height

Height of the dam is defined as the vertical distance between the lowest point on the crest of the dam and the lowest point in the original streambed.

111 feet
Structural height

Structural height of the dam is defined as the vertical distance from the lowest point of the excavated foundation to the top of the dam. Top of dam refers to the parapet wall and not the crest.

95 feet
Hydraulic height

Hydraulic height of the dam is defined as the vertical difference between the maximum design water level and the lowest point in the original streambed.

74,270 cubic feet per second
Max discharge

Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.

19,000 acre feet
Max storage

Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.

10,880 acre feet
Normal storage

Normal storage is defined as the total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surcharge storage. For normally dry flood control dams, the normal storage will be a zero value.

357 acres
Surface area

Surface area, in acres, of the impoundment at its normal retention level.

4,456 square miles
Drainage area

Drainage area of the dam, in square miles, which is defined as the area that drains to a particular point (in this case, the dam) on a river or stream.

Safety Share
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High
Downstream potential hazard

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Has emergency action plan
Emergency action plan

An emergency action plan is defined as a plan of action to be taken to reduce the potential for property damage and loss of life in an area affected by a dam failure or large flood.

6/29/2017
Most recent inspection date

Inspections are every 1 ear.

About Share
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Distance to nearest town (miles) 18
Latitude 42
Longitude -111
NID ID (National ID) ID00068

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